Yup...
The way I produce this error directly is to have one AVCHD clip that playes
for the whole time...
Then I have have another clip that I put and "in-time" and an "Out-time"
through the clip window, and drag it to be above the one longer clip that is
already there.
The I crossfade and mute the new clip, so as to have the audio from the
longer clip and the video from the newer clip for a section.
The shorter, newer clip always plays at the wrong speed.
FYI, ffpeg still does not transcode AVCHD correctly...
when I issue:
ffmpeg -i file.mts file.mp4
What I expect is an mp4 of the same duration/resolution than the mts ( AVCHD
) file. The audio is the same duration, but the video plays at 50% of the
speed.
Of course, the bitrate is down to 200bps, so the video does not look too
good, but that does not matter in this case. It just highlights a bug.
I really have tried specifying frame rates of both input and output, but
nothing seems to convince ffmpeg that I really do have a video that is
recorded at 25fps with full hd.
I do not particularly like to transcode my source material, as you can never
get the quality back, but if I have to, I would use a tool like gmerlin,
which handles these files perfectly.
Thanks for all your help, btw.
Once the bugtracker accepts my application I'll do the bug reports properly.
Sorry for putting all this in the devel mailing list.
Kind regards,
-Evert Vorster-
On Sun, Dec 6, 2009 at 6:47 PM, Dan Dennedy <dan@...> wrote:
> On Sun, Dec 6, 2009 at 12:40 PM, Dan Dennedy <dan@...> wrote:
> > 2009/12/6 Evert Vorster <evorster@...>:
> >> Hi, thanks for the help. I was following that guide as closely as my
> distro
> >> allows.
> >>
> >> I think I got most parts of it working. ( No Qimage support yet, will
> get
> >> that tonight )
> >>
> >> Already I ran into a nasty bug. I reported this to the ffmpeg guys last
> >> year, but they just ignored it.
> >>
> >> I have a Canon HF100 HD recorder. I record in 1920x1080x25fps, but
> ffmpeg
> >> picks it up as 50fps.
> >
> > Just because it reports 50 fps does not mean that it will play at the
> > incorrect speed; it depends more on the timestamps.
> >
> >> This messes around transcoding and kdenlive. I can
> >> transcode a clip fine, but once I start slicing and dicing the clips
> some
> >
> > Please be more clear about how you did "transcode."
> >
> >> run at "double speed" on the video while their audio is running
> normally.
> >
> > I have some sample clips from the 50i/25p Canon HF100, and they work
> > fine here. I did not do extensive cutting or anything, however - just
> > playback in the Clip Monitor. Also, I tested the output of Kdenlive's
> > Transcode to DNxHD, which just runs ffmpeg as a child, and that works
> > fine as well. And I am confident that cutting on the DNxHD output will
> > not give altered playback rate (less confident about that when
> > directly using AVCHD).
>
> OK, I did just see the problem when cutting the AVCHD directly.
>
> --
> +-DRD-+
>
>
> ------------------------------------------------------------------------------
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> a free event focused on virtualization and cloud computing.
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On Sun, Dec 6, 2009 at 12:40 PM, Dan Dennedy <dan@...> wrote:
> 2009/12/6 Evert Vorster <evorster@...>:
>> Hi, thanks for the help. I was following that guide as closely as my distro
>> allows.
>>
>> I think I got most parts of it working. ( No Qimage support yet, will get
>> that tonight )
>>
>> Already I ran into a nasty bug. I reported this to the ffmpeg guys last
>> year, but they just ignored it.
>>
>> I have a Canon HF100 HD recorder. I record in 1920x1080x25fps, but ffmpeg
>> picks it up as 50fps.
>
> Just because it reports 50 fps does not mean that it will play at the
> incorrect speed; it depends more on the timestamps.
>
>> This messes around transcoding and kdenlive. I can
>> transcode a clip fine, but once I start slicing and dicing the clips some
>
> Please be more clear about how you did "transcode."
>
>> run at "double speed" on the video while their audio is running normally.
>
> I have some sample clips from the 50i/25p Canon HF100, and they work
> fine here. I did not do extensive cutting or anything, however - just
> playback in the Clip Monitor. Also, I tested the output of Kdenlive's
> Transcode to DNxHD, which just runs ffmpeg as a child, and that works
> fine as well. And I am confident that cutting on the DNxHD output will
> not give altered playback rate (less confident about that when
> directly using AVCHD).
OK, I did just see the problem when cutting the AVCHD directly.
--
+-DRD-+

2009/12/6 Evert Vorster <evorster@...>:
> Hi, thanks for the help. I was following that guide as closely as my distro
> allows.
>
> I think I got most parts of it working. ( No Qimage support yet, will get
> that tonight )
>
> Already I ran into a nasty bug. I reported this to the ffmpeg guys last
> year, but they just ignored it.
>
> I have a Canon HF100 HD recorder. I record in 1920x1080x25fps, but ffmpeg
> picks it up as 50fps.
Just because it reports 50 fps does not mean that it will play at the
incorrect speed; it depends more on the timestamps.
> This messes around transcoding and kdenlive. I can
> transcode a clip fine, but once I start slicing and dicing the clips some
Please be more clear about how you did "transcode."
> run at "double speed" on the video while their audio is running normally.
I have some sample clips from the 50i/25p Canon HF100, and they work
fine here. I did not do extensive cutting or anything, however - just
playback in the Clip Monitor. Also, I tested the output of Kdenlive's
Transcode to DNxHD, which just runs ffmpeg as a child, and that works
fine as well. And I am confident that cutting on the DNxHD output will
not give altered playback rate (less confident about that when
directly using AVCHD).
> I tried signing up at MantisBT, but the link that the bugtracker sent me to
> set my password does not resolve.
Sorry, I can not help with the bug tracker.
--
+-DRD-+

Hi, thanks for the help. I was following that guide as closely as my distro
allows.
I think I got most parts of it working. ( No Qimage support yet, will get
that tonight )
Already I ran into a nasty bug. I reported this to the ffmpeg guys last
year, but they just ignored it.
I have a Canon HF100 HD recorder. I record in 1920x1080x25fps, but ffmpeg
picks it up as 50fps. This messes around transcoding and kdenlive. I can
transcode a clip fine, but once I start slicing and dicing the clips some
run at "double speed" on the video while their audio is running normally.
I tried signing up at MantisBT, but the link that the bugtracker sent me to
set my password does not resolve.
I am behind quite a restrictive firewall at the moment, no outgoing ftp, no
large html sends either. No irc, mail... almost anything that makes a
network useful... *sigh*
I'll be home next week, and then I'll be able to upload some footage and
kdenlive project files. :)
-Evert-
2009/12/6 Jean-Michel Pouré <jm@...>
> Le samedi 05 décembre 2009 à 19:08 -0200, Evert Vorster a écrit :
> > Finally I get enough of the requirements of kdenlive satisfied to
> > allow it to build & install.
>
> Follow our guidelines:
>
> http://www.kdenlive.org/user-manual/downloading-and-installing-kdenlive/installing-source
>
> Kind regards,
> Jean-Michel
>
>
>
> ------------------------------------------------------------------------------
> Join us December 9, 2009 for the Red Hat Virtual Experience,
> a free event focused on virtualization and cloud computing.
> Attend in-depth sessions from your desk. Your couch. Anywhere.
> http://p.sf.net/sfu/redhat-sfdev2dev
> _______________________________________________
> Kdenlive-devel mailing list
> Kdenlive-devel@...
> https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
>
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Le samedi 05 décembre 2009 à 11:13 -0800, Dan Dennedy a écrit :
> I do not have an AVCHD cam or any long/suitable footage with which to
> test and debug a/v sync. Can you provide something?
Can you add/locate your video camera in our database and provide some
footage: http://www.kdenlive.org/video-editor

Hi there, Dan.
Ah, I got it to work.. no Qimage though.
However, I am going to spend a little time trying to get as much of the
install according to the web page instructions before starting the bug
reports.
I don't want to put any bogus ones in there. :)
I'll see if I can update ffmpeg, because the one that was finally released
at the beginning of this year ( 0.5 ) does not support some of the
./configure switches in the web page installation instructions.
I wonder why I can't open an account in the bug tracker. I can browse the
bugs, but the link that the signup bot sent me to my mail account does not
work.
:(
Anyways... thanks for the reply!
Have a great weekend.
-Evert Vorster-
On Sat, Dec 5, 2009 at 9:09 PM, Dan Dennedy <dan@...> wrote:
> 2009/12/5 Evert Vorster <evorster@...>:
> > Hello there.
> >
> > I used to use OpenMovieEditor, as it was the only video editor that
> supports
> > the AVCHD that my Canon HF100 produces.
> >
> > I recently noticed that kdenlive also supports this format!
> > Richard Spindler, the lead developer of OME, is persuing other interests,
> > and development on this application has officially stopped till further
> > notice.
> >
> > I am also a software tester for Sorcerer, a sources based linux
> > distribution.
> >
> > So, I decide to give kdenlive a spin.
> >
> > Straight away, I run into problems. I can't find a source for
> > libschroedinger that will compile on my system. There seems to be some
> > conflict in it's gst headers. If anyone has a patch to get that to
> compile
> > on a machine with the latest gst-plugins-base installed, it would be
> greatly
> > appreciated.
> >
> > So, I skip libschroedinger, despite the dire warnings on the site about
>
> You do not need that lib; maybe it is a by-product of your FFmpeg
> package, but not Kdenlive or MLT.
>
> > getting all the requirements installed first. My FFMPEG is 0.5, I might
> > upgrade to running it from svn again.
> >
> > With MLT I have some issues as well, mostly it not liking my non-standard
> > installation of KDE.. ( it's installed into /opt/kde4 )
>
> './configure --enable-gpl --help' and look for the under the QImage options
>
> --
> +-DRD-+
>
>
> ------------------------------------------------------------------------------
> Join us December 9, 2009 for the Red Hat Virtual Experience,
> a free event focused on virtualization and cloud computing.
> Attend in-depth sessions from your desk. Your couch. Anywhere.
> http://p.sf.net/sfu/redhat-sfdev2dev
> _______________________________________________
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>
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